Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Leevi on July 15, 2016, 06:23:36 am
-
Do you think the following idea would work.
The basic idea is to share the reverb in the way that the input signal is taken
from the volume pots (pin 1) and returned as it is visible in the schematic.
Each channel will have an extra reverb pot and a serial resistor before the control tube of the tank.
I'm a bit worried that the tank can not manage signals from four channels and the result is a mess.
http://el34world.com/charts/Schematics/files/fender/Fender_cbs_pa100rev.pdf (http://el34world.com/charts/Schematics/files/fender/Fender_cbs_pa100rev.pdf)
/Leevi
-
Multiple channels driving reverb pan shouldn't be a problem. You mix the signals ahead of whatever active drives the pan in the same way you might mix individual channels.
You can look to some modern amps (Mesa, maybe?) which have individual reverb controls for each channel of the amp. While those might typically be used one at a time, all-at-a-time shouldn't be a problem.
This reminds me of multiple console channels in a recording studio, each with its own "echo" send control, which feeds a mixing network and then drives a shared reverb like a large EMT plate reverb or echo chamber.
-
PA Mixers (in days of spring reverb) had a Reverb Send on every input to one spring.
Guitar amps usually really have one input (the guitar you are playing), though several signal paths for that input to go through. Leaving reverb send active on all paths, including idle paths, invites more noise/hiss problem.